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標題: STM32F103產生PWM波并計算發送個數源碼 [打印本頁]

作者: 張超01 時間: 2018-8-21 13:37
標題: STM32F103產生PWM波并計算發送個數源碼
#include "stm32f10x.h"
#include "user_Config.h"
#include "stm32_eval.h"
#include <stdio.h>

/********************************************************************
********************************************************************/
void start_run(void);
void stop_run(void);

uint8_t  flag =0;
uint8_t  stop_flag =0; //運轉標志
uint8_t  auto_flag =0;
uint8_t  auto_flag1 =0;
uint32_t count =0;
uint32_t round =0;
uint32_t speed_cal = 750;

延時函數

void Delay(vu32 nCount)
{
      uint32_t a;
      uint32_t b;
  for(a=nCount;a>0;a--)
            for(b=8000;b>0;b--);
}

配置時鐘函數

void RCC_Configuration(void)
{
  /* TIM3 clock enable */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

  /* GPIOA and GPIOB clock enable */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE);
}

pwm波產生管腳設置

void GPIO_pwm_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //復用推挽輸出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOA, &GPIO_InitStructure);
}

正反轉及調速

void GPIO_key_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15 ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOB, &GPIO_InitStructure);
}

步進電機驅動器使能及方向控制

void GPIO_type_Configuration(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 ;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_Init(GPIOC, &GPIO_InitStructure);
      GPIO_ResetBits(GPIOC,GPIO_Pin_0);
      GPIO_SetBits(GPIOC,GPIO_Pin_1);
}

定時器設置

void pwm(void)
{
  TIM_TimeBaseStructure.TIM_Period = speed_cal;
  TIM_TimeBaseStructure.TIM_Prescaler = 3-1;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
  TIM_ClearFlag(TIM3, TIM_FLAG_Update);
  TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = speed_cal/2;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
  TIM_OC1Init(TIM3, &TIM_OCInitStructure);
  TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
  TIM_ARRPreloadConfig(TIM3, ENABLE);

  //TIM_Cmd(TIM3, DISABLE);
}

中斷優先級設置

void TIM3_NVIC_Configuration(void)
{
      NVIC_InitTypeDef NVIC_InitStructure;
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
  NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;

  NVIC_Init(&NVIC_InitStructure);
}

中斷函數（統計脈沖個數）

void TIM3_IRQHandler(void)
{
      if(TIM_GetITStatus(TIM3,TIM_IT_Update!=RESET))
      {
            TIM_ClearITPendingBit(TIM3,TIM_FLAG_Update);
            count++;
            if(count == 768750)
            {
                     count = 0;
                     round++;
            }
            if(round == 5)
            {
                     round = 0;
                     if(flag == 1)
                     {
                              if(auto_flag == 0)
                              {
                                    auto_flag = 1;
                                    stop_run();
                                    Delay(2000);
                                    GPIO_SetBits(GPIOC,GPIO_Pin_0);
                                    start_run();
                              }
                              else
                              {
                                    auto_flag = 0;
                                    stop_run();
                                    Delay(2000);
                                    GPIO_ResetBits(GPIOC,GPIO_Pin_0);
                                    start_run();
                              }
                     }
            }
      }
}

開始發送pwm

void start_run(void)
{
      TIM_Cmd(TIM3, ENABLE);
}

關閉發送pwm

void stop_run(void)
{
      TIM_Cmd(TIM3, DISABLE);
}

正傳

void start_scan1(void)
{
      if(stop_flag == 0)
      {
            if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_12)==0)
            {
                     Delay(200);
                     if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_12)==0)
                     {
                              GPIO_ResetBits(GPIOC,GPIO_Pin_0);
                              start_run();
                              stop_flag = 1;
                              while(!GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_12));
                     }
            }
  }
}

反轉

void start_scan2(void)
{
      if(stop_flag == 0)
      {
            if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_13)==0)
            {
                     Delay(200);
                     if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_13)==0)
                     {
                              GPIO_SetBits(GPIOC,GPIO_Pin_0);
                              start_run();
                              stop_flag =1;
                              while(!GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_13));
                     }
            }
  }
}

停止

void stop_scan(void)
{
      if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_15)==0)
      {
            Delay(200);
            if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_15)==0)
            {
                     stop_run();
                     GPIO_ResetBits(GPIOC,GPIO_Pin_0);
                     Delay(1500);
                     stop_flag = 0;
                     while(!GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_15));
            }
      }
}

調速

void change_speed(void)
{
      if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_14)==0)
      {
            Delay(200);
            if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_14)==0)
            {
                     if(speed_cal == 750)
                     {
                              speed_cal = 375;
                     }
                     else
                     {
                              speed_cal = 750;
                     }
                     TIM3->ARR = speed_cal;
                     pwm();
                     //TIM_Cmd(TIM3, ENABLE);
                     while(!GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_14));
            }
      }
}

自動旋轉

void auto_run(void)
{
      if(stop_flag == 0)
      {
            if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_11)==0)
            {
                     Delay(200);
                     if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_11)==0)
                     {
                              if(auto_flag1 == 0)
                                    auto_flag1 =1;
                     }
            }
  }
}
/****************************************************************************************************************************************/
int main(void)
{
  RCC_Configuration();
  GPIO_pwm_Configuration();
  GPIO_key_Configuration();
  GPIO_type_Configuration();
  TIM3_NVIC_Configuration();
  pwm();
  while (1)
  {
            auto_run();
            if(auto_flag1 ==0)
            {
                     start_scan1();
                     start_scan2();
                     stop_scan();
                     change_speed();
            }
            else
            {
                     if(flag == 0)
                     {
                              flag = 1;
                              GPIO_ResetBits(GPIOC,GPIO_Pin_0);
                              start_run();
                     }
                     if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_15)==0)
                     {
                              Delay(200);
                              if(GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_15)==0)
                              {
                                    stop_run();
                                    GPIO_ResetBits(GPIOC,GPIO_Pin_0);
                                    auto_flag1 =0;
                                    while(!GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_15));
                              }
                     }
            }
      }
}

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